backflow

from WordNet (r) 3.0 (2006)

backflow
    n 1: a flow that returns toward its source [syn: {backflow},
         {backflowing}]

from Moby Thesaurus II by Grady Ward, 1.0

20 Moby Thesaurus words for "backflow":
      Charybdis, Maelstrom, back stream, backwash, backwater,
      countercurrent, counterflow, counterflux, eddy, gulf, gurge,
      maelstrom, refluence, reflux, regurgitation, swirl, twirl, vortex,
      whirl, whirlpool